Year	Percent
1950	29.61864
1955	29.9145
1960	30.05892
1965	30.06953
1970	29.67636
1975	28.20057
1980	26.73401
1985	25.62796
1990	25.35175
1995	26.27449
2000	27.37982
2005	28.38265
2010	28.96356
2015	29.34638
2020	29.93825
2025	30.7823
2030	31.93232
2035	32.79484
2040	33.25633
2045	33.2926
2050	32.98636
2055	32.64213
2060	32.21494
2065	31.69482
2070	31.12764
2075	30.5655
2080	30.00687
2085	29.48234
2090	28.977
2095	28.48714
2100	28.03503